Roof drain



April 8, 1930. J. c. cRoMwELL 1,753,262

ROOF DRAIN Filed Aug. 19, 1924 INVENTOR Patented Apr. 8, 1930 UNITED STATES warez PATENT OFFICE JOHN C. CROMWELL, OF COLUMBUS, OHIO, ASSIGNOR, BYV MESNE ASSIGNMENTS, T0 THE TESTITE COMPANY, A CORPORATION R003:l1 DRAIN v Application filed August 19, 1924. Serial No. 732,833.

The present invention relates broadly to roof drains and has for one of its objects the provision of a drain of this character having a removable strainer detachably held in position and centered by the holding means.

Certain features of the invention are claimed in my copending application Serial No. 878,940, led July 17, 1929, which application is a division of this application.

In the accompanying drawings, I have shown for purposes of illustration only, a preferred embodiment of the present invention, it being understood that the drawings do not deline the limits of the invention, as changes may obviously be made in the construction without departing from the spirit of the invention or scope of mycbroader claims.

In the drawings,

Figure 1 is a top plan view of a portion of a roof having my improved drain in position therein; and Y n Figure 2 is a vertical sectional view through the structure illustrated in Figure 1.

In carrying out the present invention there may be provided a drainage cup 2' having its upper portion enlarged to providea water receiving space 3 and having its lower end 4C contracted to cooperate with the upper end of the usual drainage or soil pipe.

Projecting outwardly from they upper edge of the enlarged chamber 3 is a horizontally extending flangeJ 5 adapted to be embedded in the roof with its upper surface substantially flush with the upper surface of the roof.y This permits thefrooling material or covering 6 to be laid smoothly both over the roof and over the iiange 5. A portion of the body of the roofing material is preferably cut away to provide an opening slightly smaller than the diameter of the chamber 3, whereby there is provided a surplus of material adapted to project downwardly into the chamber 3. For tightly clamping the roofing material in position, there is preferably provided a detachable clamping ring 7 having projecting therefroma plurality of wedge shapedclamping projections 8 adapted to form therebetween drainage openings or recesses 9. Pref* erably the dimensions of the clamping ring will besuch that with the parts in clamping position as clearly shown in Figure 2, the upper edge of the ring 7 will project'above the .level of the roof. In this position the drainage of` water into the cup 2 will be permitted by reason of the openings 9, while the pas-k sage of'foreign bodies of undue size will be checked by the clamping ring.

Projecting upwardly from the linner portion of the cup 2 are diametrically opposed lugs 10 having inwardly extending webs 11 formed with openings 12. These webs are adapted to cooperate with and automatically center a strainer 13 of substantially dome shape adapted to project above the level of the roof and provided with a series of drain- ,age openings 14. The base iiange 15 of the Vstrainer is preferably provided with diametrically opposite slots 16' adapted to straddle the webs l11. With the parts in assembled position locking pins or keys 17 may be passed through the openings 12 to prevent accidental removal of the strainer. At the same time, it will be apparent easy removaLof .the strainer is permitted by simply withdrawing the locking means 17.

The advantages of the present inventionL arise from the provision of a roof drain adapted to be easily Vpositioned at any desirable point in a roof and having improved means for both clamping the roolingmaterial In a roof drain, a drainage cup adaptedto be embedded in a roof and formed with a lower portion for cooperation with a drain pipe, upwardly projecting lugs formed in the bottom of said cup, a strainer having a lateral' projecting flange shaped to cooperateV n with said lugs, and=means cooperating with said lugs for holding the strainer in position. In testimony whereof I have hereunto set m hand.

y JOHN C. CROMWELL. 

